Static link rocksdb with Nimbus. (#2084)

* Static link rocksdb into Nimbus.

* Link in additional compression libraries.

* Support static linking for MacOS.

* Add flag to support disabling rocksdb static linking.

* Static linking is disabled by default. Build nimbus with static linking using: make nimbus_rocksdb_static

* Update nim-rocksdb to latest.

Makefile

@@ -115,6 +115,7 @@ VERIF_PROXY_OUT_PATH ?= build/libverifproxy/
 	libnimbus.so \
 	libnimbus.a \
 	libbacktrace \
+	rocksdb \
 	dist-amd64 \
 	dist-arm64 \
 	dist-arm \
@@ -225,6 +226,11 @@ nimbus: | build deps
 	echo -e $(BUILD_MSG) "build/$@" && \
 		$(ENV_SCRIPT) nim c $(NIM_PARAMS) -d:chronicles_log_level=TRACE -o:build/$@ "nimbus/$@.nim"
 
+nimbus_rocksdb_static: | build deps rocksdb_static_deps
+	echo -e $(BUILD_MSG) "build/$@" && \
+		$(ENV_SCRIPT) nim c $(NIM_PARAMS) -d:enable_rocksdb_static_linking -d:chronicles_log_level=TRACE \
+		-o:build/$@ "nimbus/nimbus.nim"
+
 # symlink
 nimbus.nims:
 	ln -s nimbus.nimble $@
@@ -233,6 +239,10 @@ nimbus.nims:
 libbacktrace:
 	+ $(MAKE) -C vendor/nim-libbacktrace --no-print-directory BUILD_CXX_LIB=0
 
+# nim-rocksdb static dependencies
+rocksdb_static_deps:
+	+ vendor/nim-rocksdb/scripts/build_static_deps.sh
+
 # builds and runs the nimbus test suite
 test: | build deps
 	$(ENV_SCRIPT) nim test_rocksdb $(NIM_PARAMS) nimbus.nims

config.nims

@@ -159,3 +159,21 @@ if defined(windows) and defined(i386):
 # nim-kzg shipping their own blst, nimbus-eth1 too.
 # disable nim-kzg's blst
 switch("define", "kzgExternalBlst")
+
+# RocksDB static linking is disabled by default
+when defined(enable_rocksdb_static_linking):
+
+  when defined(windows):
+    {.fatal: "RocksDB static linking is not supported on Windows".}
+
+  switch("define", "rocksdb_static_linking")
+
+  # use the C++ linker profile because it's a C++ library
+  when defined(macosx):
+    switch("clang.linkerexe", "clang++")
+  else:
+    switch("gcc.linkerexe", "g++")
+
+  switch("dynlibOverride", "rocksdb")
+  switch("dynlibOverride", "lz4")
+  switch("dynlibOverride", "zstd")